87784 Wearable 2-in-1 WBGT + HI Heat Index Checker Wet Bulb Globe Temperature Heat Stress Meter

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87784 Wearable 2-in-1 WBGT + HI Heat Index Checker Wet Bulb Globe Temperature Heat Stress Meter

Regular Price $21.90
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The Heat Index WBGT/HI meter measures air temperature, globe temperature, and humidity to know heat stress index. It is used in control of physical activity in hot environment and limit the danger of heat-related injuries.

87784 WBGT Heat Index Meter has a small black ball and can carried easily. It has specific angle, so you don't need to worry about human temperature that might affect the meter’s accuracy. 

The measurement of 87784 WBGT HI Checker can be a good element for monitoring the outdoor activities and prevent people to get heat stroke. It is used in construction, iron and steel foundries, bricks-firing plants, glass facilities, boiler rooms, mining sites, army training, marathon, beach activities and so on.


  • Direct measurement of the radiation effect with ABS black ball
  • Accurate Temperature and RH sensor
  • Simultaneous display of WBGT, HI, Temperature, & RH
  • Measure outdoor and indoor heat stress
  • Programmable buzzer & red LED danger zone warning
  • Adjustable audible alarm volume (75dB/60dB/mute)
  • 4 Dangerous Level indicator display (Caution / Extreme Caution / Danger / Extreme)
  • Wearable design (comes with arm strap) or mount in a tripod
  • Display updates every 20 seconds
  • Adjustable alarm threshold
  • Big LCD display
  • Switchable IN/OUT mode 
  • Celsius / Fahrenheit Temperature unit
  • Low battery indicator


  • Measurement Range
    • Air Temperature: 0~50°C (32~122°F)
    • WBGT Temperature: 0~50°C (32 ~ 122°F)
      • Alarm range: 20~50°C (68 ~ 122°F)
    • HI Temperature: 0~60°C (32 ~ 140°F)
      • Alarm range: 20~60°C (68 ~ 140°F)
    • Humidity: 0.1~99.9%RH
  • Accuracy
    • Air Temperature: ±0.6°C
    • Humidity: 10~90%RH@25°C: Typical 5%, others 7%
  • Dangerous Level Indicator
    • Caution
      • WBGT: 26.7~29.4°C (80~84.9°F)
      • HI: 27~31.9°C (80.6~89.4°F)
    • Extreme Caution
      • WBGT: 29.4~31°C (85~87.9°F)
      • HI: 32~40.9°C (89~105.6°F)
    • Danger
      • WBGT: 31~32.2°C (88~89.9°F)
      • HI: 41~53.9°C (105.7~129°F)
    • Extreme Danger
      • WBGT: >32.2°C (>90°F)
      • HI: ≥54°C (>129°F)
  • Resolution: 0.1°C / °F, 0.1%RH
  • Black ball size: 40mm diameter
  • LCD Size: 40 (H) x 39 (W)mm
  • Stabilization time: 15~25min typical
  • Operating condition: 0~50°C, <80% RH
  • Storage condition: -20~50°C, <90% RH
  • Dimension: approx. 70 (H) x 60 (W) x 22(T) mm
  • Weight: approx. 90gms
  • Battery life: approx. ~300hrs

Set Includes:

  • 1 x WBGT + HI Meter
  • 2 x AAA Size batteries 
  • 1 x Arm Strap
  • 2 x Buckles
  • English Instruction Manual
  • Standard Factory Packaging

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